Lamp



E. A. HAWTHORNE.

LAMP.

I A PPLICATION FILED FEB. 9, 19 12. 1,402,352, Patented Jan. 3, 1922 2 SHEETS-SHEET 2.

inurse'srarss Parent onnce-v ELLSWORTH A. HAWTHORNE, 0F BRIDGEPORT, CONNECTICUT.

LAMP.

Specification of Letters Patent.

Patented Jan. 3, 1922.

. Application filed February 9, 1917. i Serial No. 147,702.

To all whom it 772114] concern:

Be it known that I, ELLswoR'rH A. HAW- THORNE, a citizen of the United States, and a resident of Bridgeport, county of Fairfield, and State of Connecticut, have in-\ vented an Improvement in Lamps, of which the following description, in connection with the accompanying drawings, is a' specification, like characters on the drawings representing like parts.

This invention relates to lamps, and is more especially, though not exclusively, concerned with dirigible electric search lights of the type commonly called spot-lights used on motor cars. 1

My invention will be best understood by reference to the following description, when taken in connection with the accompanying drawings showing one specific embodiment thereof, while its scope will be more particularly pointed out in the appended claims.

In the drawings:

Fig. 1 is a central longitudinal sectlonal view in plan of a lamp embodying my 1nvention;

Fig. 2 is a detail, sectional view. of a modification of the means of attachment of the mirrorscope to the outside of the lamp casing;

Fig. 3 is a detail sectional view on line 3-3 of F ig. 1;

Fig. 4 is a sectional view on line 4-4 of Fig. 1;

Fig. 5 is a side elevation of the handle;

Fig. 6 is a sectional view on line 6-6 of Fi 1' Fig. 7 is a central, longitudinal, sectional View of the handle shown in Fig. 5;

, Fig. 8 is a detail, sectional view on line 8--8 of Fig. 1, and

Fig. 9 is a detail, sectional view on line 9-9 of Fig. 7.

Referring to the drawings, and to the embodiment of my invention which I have selected for illustration, I have there shown a lamp comprising a lamp casing, including a body portion 10 and a bezel or door 11, the latter serving as a mounting or frame for a usual lens or glazing 12, held in place by suitable means, such as a retaining ring 13.

The bezel 11 is herein provided with a circumferential flange 14, encircling and telescoping with a circumferential flange 15, formed as a part of the body portion 10.

As a means for securing the bezel to the body portion of the caslng, I have herein provided a plurality of screws 16 extending through suitable perforations in the flanges 14 and 15, and threaded mto nuts 17 The latter are herem in the form of brackets rigidly secured to the body portion 10 of the casing by rivets 18 passing through the latter and through the brackets, as best seen in Fig. 1. The removal of the bezel is effected by simply unscrewing and removing the screws 16, and thenwithdrawin the bezel axially.

Within the'casing, is a suitable source of llght, hereln an incandescent electric bulb 19, the latter being mounted in a suitable socket 20, herein of the Ediswan type. ThIS SOCkGt, in turn, is mounted in and secured toa surrounding sleeve or hub b suitable means, herein a set screw 22. This sleeve or hub is secured to and forms a sort of neck on a suitable reflector 23, herein of the parabolic type. The reflector 23 may be secured in fixed position within the casing by any suitable means, but herein the brackets 17 are provided with inwardly projecting lugs 24, which are threaded to receive "screws25, the latter passing through slots ance about the body of the screw, while the enlarged portion of the slot is of such dimensions as to permit the enlarged head of the screw readily to pass therethrough. By this means, the reflector may be removed simply loosening the screws very slightly, and rotating the reflector about its axis to bring the enlarged portions of the slots in registration with the screw heads, after which, the reflector may be removed axially from its place. This permits access to that portion of the interior of the casing which is at the rear of the reflector, and allows any needed adjustments or repairs to be made. The reflector can be replaced by a reversal of the foregoing operation, and then clamped by binding screws.

In the form herein shown, the lamp casing as a whole is mounted upon an adjustable support permitting the angular adjustment of the lamp in any direction. Herein, the lamp body is provided with cars 30, pivdle 34, suitably attached to the body portion of the lamp casing. This hollow handle provides a convenient housing for lamp controlling means, herein a switch 35. This switch herein comprises an operating handle 36, having a grasping portion located exteriorly of the handle, and preferably coaxially therewith. The switch-operating handle is mounted to turn in a sleeve 37, which is provided with a slot 38 to receive a pin 39 carried by the switch-operating handle, the extent of whose turning movement is limited by said pin and slot.

The switch-operating handle herein carries a contact piece 40, which in one position of the handle contacts with a pair of spring-pressed contact pins 41, the latter being mounted in a terminal plug 42, held in switch handle. The spring-pressed terminals 41 are connected in the usual and wellknown manner by conducting wires 43 to the lamp bulb 19, and to a suitable source of current not shown. It is unnecessary here to describe the connection of these lead wires to the lamp terminals, or to go into further details of the switch, since these parts are all of familiar construction.

The hollow handle 34 forms a convenient housing for the switch and the lead wires, the latter extending into the body portion of the lamp casing through registering apertures 44 and 45, one in the rear end of the casing and the other in the front end of the handle. For convenience in assembling and dismounting the parts, and for providing access to the switch and lead wires for the purpose of inspection and repair, the handle 34 is. herein made in two parts 46 and 47 suitably secured together. In the present instance, these parts telescope one upon the other, and the part 46 is provided with a' suitable shoulder 48, against which the part 47 is brought in assembling the parts. As a means to secure the parts together when so assembled, I have herein provided a species of bayonet joint connection between them. As herein constructed, the part 47 is provided with a hollow circumferential bead 49, having an internal groove 50 to receive a plurality, herein two, projections 51 formed on the part 46. To permit the introduction of these projections into the circumferential 6 groove, the part 47 is provided with longithe sleeve 37 in axial alignment with the 'tudinal beads 52, having internal grooves 53 to receive the projections 51. The longitudinal grooves 53 communicate with the circumferential groove 50, so that by first entering the projections 51 into the grooves 53, and moving the parts axially one upon the other until the inner end of the part 47 brin s up against the shoulder 48, and then turning the parts 46 and 47 one upon the other, the projections 51 are caused to move circumferentially in the groove 50.

The extent of turning movement of the projections 51 in the groove 50 may be determined by suitable means, as for example, projections 54 and 55 herein formed by indenting the bead 49 at the desired points, thus forming stops. Two of the stops 54 are provided, one adjacent each of the longitudinal grooves 53, the location of these stops beingsuch as to permit the relative rotation of the two handle parts in but one direction to accomplish the locking of such parts together. After the projections 51 have thus been brought into the groove 50 at points adjacent the stops 54, the two parts are relatively rotated until the projections 51 bring up against the stops 55, which are relatively remote from the longi-v tudinal grooves 53. The parts are now locked against relative axial movement. In unlocking the parts, turning the one upon the other in the opposite direction brings the projections 51 up against the stops 54, and into registration with the grooves 53, whereupon the handle parts may be separated one from the other by moving them axially.

As herein constructed, the switch 35 is. permanently attached to, and constitutes a unit with, the handle part 47, so that in removin the latter, the switch is carried away rom the handle part 46, and the parts are thus rendered easily accessible for purposes of inspection and repair. To this end, the sleeve 37 is herein permanently attached to the-handle part 47 by providing the latter with an inwardly directed flange 56, soldered, welded, or otherwise suitably united with the sleeve.

As a'nieans for securing the handle 34 to 115 the body portion 10 of the lamp casing, the handle part '46 is herein provided with an inwardly directed flange 57, abutting against a similar inwardly directed flange 58 formed on the body portion 10. These flanges may 'herein a retaining rin tween the front face 0 the mirror and an Leoasea yet without interference with the lead wires from the switch.

In the use of motor cars, they are frequently provided with mirrors called mirrorsco es, which enable the operator of a car, wit out turning his head, to see objects at the rear. In some cases, it has been found convenient to attach these mirrors'or mirrorscopes to s otlights or searchlights of the type exempli ed by that described herein, since by this means it is found possible to manipulate the mirror and vary its angle at will b shifting the lamp on its adjustable brac et. For this purpose, I have herein provided a mirror or mirrorscope 62, mounted in a mirror holder 63, the latter being external to the lamp casing, but per manently united therewith. To this end, the mirror holder is provided with a raised central portion 64, constituting a species of shoulder or boss which abuts against a convex wall 65 of the body portion 10 of the lamp casing, the arrangement being such that the marginal portlon of the mirror holder diverges from the lamp casing, as plainly shown in Figs. .1 and 2. In the form shown in Fig. 1, the mirror holder is permanently united with the lamp casing by electrically welding the two parts together by the use of a s ot-welding process, which makes the parts integral, as represented in section in Fig. 1, while in the form illustrated in Fig. 2, the parts are united by the use of a suitable rivet 66. The latter is herein of the tubular type, and passes through registering perforations in the mirror holder and lamp casing, it bein secured to the latter by expanding the tubu ar shank of the rivet at 67, by spinning or riveting the same over onto the inside of the lamp casing, thus forming a flange or flanges locking andpermanently uniting the mirror holder with the lamp casing. The mirror is secured in place in the mlrror holder by suitable means external to the lamp casing,

68 interposed beinwardly directed flange 69.

Having thus described one embodiment of my invention but without limiting myself thereto except as required by the claims, what I claim and desire by Letters Patent to procure is:

1. The combination with a lamp casing, of a mirror, a mirror holder mounted on the exterior of said lamp casing, means external to said lamp casing and normally accessible from the exterior thereof to fasten said mirror in said mirror holder, and means permanently and inseparably uniting said mirror holder with said lamp casing.

2. The combination w1th a lamp casing, of a mirror, a mirror holder having its central portion secured to said lamp casing and having a marginal portion diverging therefrom, and means external to said lamp casing to fasten said mirror in said mirror holder.

3. The combination with a lamp casing, having a convex external surface, of a mirror, a mirror holder having its central portion secured to said casing against said convex surface, and having a marginal portion diverging from said convex surface, and means to secure said mirror in said mirror holder.

4. In a lighting apparatus, the combination of a lamp casing, a hollow handle forming a rearward prolongation of said lamp casing, said handle comprising two axially separable parts, lamp controlling means having a part disposed within a part of said hollow handle and accessible by axially separating said handle parts, and a lamp mounted in said casing independently of the rear handle part.

5. In a, lighting apparatus, the combination of a lamp casing, a hollow handle comprising two' axiall' separable parts one of which adjoins sai casing while the other is axially removable from the first, lamp controlling means having a part disposed within a part of said hollow handle, and a lamp mounted in said casing independently of the axially removable part of said handle.

6. In a lighting apparatus, the combination of a lamp casing, a hollow handle com prising two axially separable parts one of which adjoins said casing while the other is axially removable from the first, lamp controlling means having a part disposed within a part of said hollow handle, a lamp mounted in said lam casing independently of the axially remova le part of said handle, and flexible means connecting said lamp to said lamp controlling means.

7 In a lighting apparatus, the combination of a lamp casing, a hollow handle comprising two axiall separable parts one of which adjoins sai casing while the other is axially removable from the first, lamp controlling means having a part disposed within a part of said hollow handle, a lamp mounted in said lamp casing independently of the axially removable part of said handle, and means extending from said lamp controlling means through the other part of said handle into said casing and connecting said controlling means to said lamp.

8. In a lighting apparatus, the combination of a lamp easing, a hollow handle comprising two axially separable parts, one of which adjoins said casing, while the other is axially removable from the first, lamp controlling means having a part disposed within the removable part of said handle, and a lamp mounted in said casing independently of th removable part of said handle.-

9. In a lighting apparatus, the combination of a lamp casing, a hollow handle commeans having a part disposed within said hollow handle, a lamp mounted in said cas ing, and lamp-supply conducting means extending laterally to said lamp and lamp controlling means.

11. In a lighting apparatus, the combination of a lamp casing, a hollow handle having a hollow grasping part rearwardly detachable from said casing, lamp controlling means having a part disposed within said hollow handle and having a lamp-controlling handle adjacent the outer end of said hollow handle, and lamp-supply conducting means connected to said lamp and lampcontrolling means intermediate the rear end of said lamp and the front end of said lampcontrolling handle and independently of said lamp-controlling handle.

12. In a lamp, the combination of a casing comprising a hollow body and a hollow handle therefor, said casing presenting a rearwardly facing abutment, and said handle presenting a forwardly facing abutment abutting against the first-mentioned abutment, said body and handle presenting a chamber, a reflector housed in the forward part of said chamber, a light source associated with said reflector and supported thereby, and light-source controlling means housed within said chamber at the rear of said reflector and within said handle and supported by the latter independently of said reflector.

In testimony whereof, I have signed my name to this specification.

ELLSWORTH A. HAWTHORNE. 

